Other

Rajesh Mundhada

Aravind Ganesan

Pramod Udupa

Deepak Karkala

A system for implementing a mixed radix fast fourier transformation is disclosed. The system includes a data source, a digit-reverse address generator, a data memory, a register array, a control unit, a butterfly extraction unit, a twiddle factor generator, and a computation unit. The data sourceprovides input data. The digit reverse address generatorprocesses the input data (i) to generate a digit reverse index and performs a digits reverse address calculation. The data memorystores the input data. The register arrayincludes one or more registers that are configured to cache multiple data words. The control unitincludes of identifying butterfly operations and generate addresses for fetching/storing data. The butterfly extraction unitextracts data samples. The twiddle factor generatorgenerates and outputs a twiddle factors based on the current radix and radix configuration. The computation unitperforms twiddle factor multiplications and the butterfly operations for current radix.

System and method for optimizing mixed radix fast fourier transform and inverse fast fourier transform

Methods and systems of symbol level interference cancellation at a receiver for multiuser detection is provided. In an embodiment, the method includes performing an interference cancellation based decoding for a plurality of users through a plurality of iterations for generating a plurality of soft bit estimates for each of the users during each of the iterations. Each of the iterations involves sequential cancellation of each of the user signals for performing interference cancellation based decoding for each subsequent user other than a first user. The method also includes re-using the generated plurality of soft bit estimates for performing each subsequent iteration of the interference cancellation based decoding of the plurality of users. A plurality of soft bit estimates associated with each user generated during an (N&#x2212;1)iteration is re-used during an Niteration for the user, N being a whole number with a minimum value of 2.

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Bengaluru, India

Rajesh Mundhada